Malicious PDF — malware analysis report

Static analysis result for SHA-256 673ef3eed084c311…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 05:25:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: afa71c939023779a8ee44e7957c9bb98 SHA-1: 132d9b2107d2442f5ec8603c1481eb009a214c4e SHA-256: 673ef3eed084c31141948a3c4e4807b4316ec7e52523d6181c5393cc930f0e7f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a document body that promotes game cheats and hacks, indicating a lure for users to download further content. The ML classifier and PDF link farm heuristics strongly suggest malicious intent, likely to deliver a second-stage payload or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.co/app/431946152/roblox-legend-of-the-fallen-kingdom-2-rpg-cheats-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-no-human-vervication_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-in-roblox-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-past-free-robux-roblox-hack-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pseint-exist-hack-roblox-lvl-6_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-games-at-roblox-com-htm_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-robux-illimit_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-client_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB6 22352 bytes
SHA-256: 776dfed44a7e80d4e467580ac0c2e7d76b812b5772774e53d1a2998708e0262c
font_01_sfnt_off00006032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6032 19772 bytes
SHA-256: 5fc3bed28ad9e3567e86051c089770bc30a78024213553f47ebc1cafcca67da7

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